Parathyroid hormone acutely increases polyphosphoinositides of the rabbit kidney cortex by a cycloheximide-sensitive process.

Parathyroid hormone(PTH) rapidly increases the concentrations of diphosphoinositide and triphosphoinositide in rabbit kidney cortex. Cycloheximide pretreatment abolishes these effects of PTH. These findings are similar to those reported for adrenocorticotropin and cyclic AMP action in the adrenal cortex, and suggest a common mechanism. Cycloheximide-sensitive effects of PTH, e.g., phosphaturia, may require polyphosphoinositides and/or other phospholipids.